Adhesive binding cover

ABSTRACT

Adhesive binding folder for binding loose sheets with two outside enclosing covers, joined to each other by a back strip which carries a double self adhesive layer against which the narrow rear edges of the bound inner sheets are positioned. The layer includes a removable strip to expose the adhesive and thereby adhere to the sheets. An inner protective sheet for the purpose of attachment penetrates with a narrow margin into the contact interface of the self adhesive layer. Said sheet serves to cover the self-adhesive layer laid bare by pulling out individual sheets.

United States Patent {191 Heimann Sept. 3, 1974 ADHESIVE BINDING COVER[76] Inventor: Egon Heimann, Falkenberg 61, 56,

Wuppertal-Elberfeld, Germany [22] Filed: Apr. 2, 1973 [21] Appl. No.:346,887

Related U.S. Application Data [63] Continuation of Ser. No. 97,412, Dec.3, 1970,

abandoned. i

[52] US. Cl. ..'.l.. 281/2l R, 281/29 [51] Int. Cl B42d 1/04 [58] Fieldof Search 281/21 R, 29

[56] References Cited Y UNITED STATES PATENTS 3,188,114 I 6/1965 OBrienet a1 281/21 R 3,210,093 10/1965 Steidinger 281/21 R FOREIGN PATENTS ORAPPLlCATIQNS 1,282,002 -11/l968 Germany 281/21 R 6,711,263 2/1969Netherlands 281/21 R Primary ExaminerJerome Schnall Attorney, Agent, orFirm-Spencer & Kaye [5 7] ABSTRACT Adhesive binding folder for bindingloose sheets with two outside enclosing covers, joined to each other bya back strip which carries a double self adhesive layer against whichthe narrow rear edges of the bound inner sheets are positioned. Thelayer includes a removable strip to expose the adhesive and thereby ad--here to the sheets. An inner protective sheet for the purpose ofattachment penetrates with a narrow margin into the contact interface ofthe self adhesive layer. Said sheet serves to cover the self-adhesivelayer laid bare by pulling out individual sheets.

3 Claims, 8 Drawing Figures PATENTEDSEF 31914 3,833,244

SHEET 20F 3 594mm aw ADHESIVE BINDING COVER CROSS-REFERENCE TO RELATEDAPPLICA- TION No. 97,412,,filed Dec. 3rd, 1970, now abandoned.

7 SUMMARY OF THE INVENTION The invention relates to an adhesive bindingfolder with two outside enclosing covers, joined to each other by a backstrip. The strip carries a self-adhesive layer against which the narrowrear edges of the bound inner sheets are positioned. The layer includesa removable strip to expose the adhesive and thereby adhere to thesheets. The conventional back strips connecting the enclosing coversconsist of relatively thick material. This is necessary for applying asufficiently thick self-adhesive layer to the back strip. However,inconvenience in folding and adjusting of the back strip to the narrowedges of the sheets is usually encountered.

Unfortunately, pliable back strips of thinner material do not possessthe-required amount of a thinner adhesive coating, so that the los elybound sheets are not firmly retained.

Thus the problem encountered by the prior art co'n- This application isa continuation of application Ser.

cover the bared self-adhesive layer of the back strip before theindividual sheets have been bound in, and, on the other, theself-adhesive coating, for instance of siliconized carrier stripmaterial, upon it becomes attached to the self-adhesive layer of theback strip.

The outside edges of this two-fold adhesive layer,

I greatly facilitate the provision of an inner protective sists inproviding an adhesive binding folder comprising a backstrip which joinsthe enclosing covers and, to 'ensure an easy folding movement of theenclosing covers,

- is made of thin material, additionally the'choice of thin materialmustpossess a secure adhesive bond to prevent self-release of theindividualbound sheets. An additional requirement is the formation of anadhesivebinding folder to prevent the sticking-of the topmost sheet tothe self-adhesive layer exposed by-the pulling out of individual sheets.

The present invention suggests a self-adhesive layer of the back stripformed double'between the edges of the enclosing covers facing eachother by means of a transfer strip adhesively secured in this zone.

The outer edgesof the twofold adhesive layer are spacedfrom the opposingparallel edges of theenclosing covers and secured thereto.

The invention further suggests a-protective sheet proleaf, which for thepurpose of attachment penetrates with a narrow margin into the contactinterface of the self-adhesive layers. This inner protective leaf servesto cover the self-adhesive layer laid bare by pulling out individualsheets to prevent theflat adhesion of the sheet left topmost. Thinplastic foil is particularly suitable as material for the innerprotective leaf. The secure contact of theflat margin of the innerprotective leaf with the self-adhesive layer of the back strip exposedby the tearing out of individual leaves is expedited by giving anelectrostatic charge to the inner protective leaf of plastic foil.

BRIEF DESCRIPTION OF DRAWINGS The invention will now be described by wayof examplewith reference to thedrawings in which FIG. 1- is an elevationof the adhesive binding folder according to the first embodiment of theinvention;

FIG. 2'is a top view'of the unfolded back strip joining the enclosingcovers by the transfer strip;

FIG- 3 is a section view along line III-III in FIG. 2 in magnifieddiagrammatic presentation;

,FIG. 4 is similar to FIG. 3 with the carrier strip mate- 7 rialremoved;

jecting into the contact interface of the two selfadhesive layers.

The invention further envisions an inner protective sheet made of a thinplastic foil.

The invention consists in an adhesive binding folder with two outsideenclosing'covers interconnected by a back strip having an inward selfadhesive layer against which are applied't he thin rear edges of thebound inner leafs.

The invention produces an adhesive binding folder whose back stripdetermined by the structural height of thin material ensures a securebond with the individual sheets held by it. Despite the thinness of theback strip FIG. 5 is a section view through the adhesive binding folderwith individual leaves emplaced;

FIG. 6 is a second form of embodiment according to FIG. 3 incorporatingan inner protection leaf;

FIG. 7 is a section view of an adhesive binding folder provided -withaninner protection leaf and bound sheets; and v FIG. 8 is similar to FIG.7 with individual sheets partly removed. I

In the embodiment illustrated in FIGS. 1 to 5 the adhesive bindingfolder includes enclosing covers land 2 interconnected by a back strip3; The, latter is inwardly provided with a self-adhesive coating 4.

In the portion between the parallelly aligned opposing edges 1 and 2' ofthe enclosing covers 1 and 2, a transfer strip 5 is secured over theself-adhesive layer 4 of the back strip 3. This transfer strip 5consists of a carrier strip 7, one side of which is provided with acoating of silicone 6. A second adhesive layer 8 is arranged upon thesaid silicone layer 6.

The secondary adhesive layer 8 is deposited against the self-adhesivelayer 4 of the back strip. The second adhesive layer 8 is adjusted tothe back strip 3 to dispose the outer margins 8 of the adhesive layer 8a distance x from the opposing edges 1' and 2 of the enclosing covers 1and 2.

To bind a stack of sheets made up of individual leaves 9 the carrierstrip 7, provided with the silicone layer 6, is removed while the secondadhesive strip 8 maintains its bond with the self-adhesive layer 4. Inthis way, a

double self-adhesive layer is obtained on the back strip 3 in the zonebetween the opposing edges 1 and 2' of the enclosing covers 1 and 2, thesaid layer entering into an intimate bond with. the narrow rear edges 9'of the individual leaves 9.

Owing to the space 1:, the binding-in of the individual leaves 9 is madeeasier. Further, this space 1:, which is at least as wide asthethickness measurement of the enclosing cover 1 or 2, facilitates thefolding of the adhesive bindingfolder.

I The embodiment shown in FIGS. 6 to 8 incorporates an inner protectiveleaf 10. This inner protective leaf, made of a thin plastic foil,projects with its narrow margin into the contact gutter F of the twoselfadhesive layers 4 and 8..Once the carrier strip 7 has been pulledback, the second adhesive layer becomes attached'to the adhesive layer 4and to the margin 10' of the inner protective leaf 10. Accordingly, theindividual leaves 9 can be brought into adhesive bond with the exposeddouble adhesive layer.

If, beginning with FIG. 7, individual leaves 9 are withdrawn from theadhesive binding folder by being pulled off from the self-adhesive layer8, the self-adhesive layer 4 will be partly' exposed. To prevent thisfrom entering into a flat bond with the topmost individual sheet, theinner protective leaf 10 covers the exposed self-adhesive layer see FIG.8. The secure contact of the sectional area of the inner protective leaf10 with the bared self-adhesive layer may be expedited by anelectrostatic charge upon the inner protective leaf '10,

which is made of thin plastic foil.

What I claim is:

1. An adhesive binding folder comprising: a backing strip; a firstcoating of self-adhesive material having a first surface, said coatinghaving a substantially uniform thickness and being attached to saidbacking strip on one surface thereof; two outside enclosing covers whichare directly attached to a second surface of said first adhesive coatingopposite said backing strip so as being disposed exclusively in the areabetween the two outside covers whereby individual leaves can be attachedto said second adhesive coating between said covers and the totalthickness of adhesive-being greater in the area covered by said secondcoating than in the area covered only by said first coating; a carrierstrip having a silicone coating on one surface thereof and beingattached to said second adhesive coating along the surface having saidsilicone coating on the side opposite said backing strip and capable ofbeing easily removed from said second coating, whereby the individualleaves can then be attached to said second coating;

. and an inner protective sheet having an edge zone extending along oneof said elongated margins, said zone being interposed between said firstadhesive coating and said second adhesive coating, said inner protectivesheet being .arranged so as to cover at least a portion of theoutersurface of said second adhesive coating for covering adhesiveexposed by removal of individual leaves.

2. Adhesive binding folder as set forth in claim 1, wherein said secondadhesive coating is spaced from each of said covers by a predetermineddistance, which is at least equal to the thickness ,of said covers, whenthe covers are in an open position.

3. Adhesive binding folder as set'forth in claim 1 wherein said innerprotective sheet is made of a thin plastic foil.

v UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No.,833,244 Dated September 3rd, 1974 Inventor-(s) Eqon Heimann It iscertified that error appears in the above-identified patent and thatsaid Letters Patent are hereby correctedl as shown below:

In the heading of the patent, after line 5, insert:

Foreign Application Priority Data Dec. 5, 1969 Germany. l96l040- Signedand sealed this 24th day of December 1974.

(SEAL) Attest:

MCCOY M. GIBSON JR. c. MARSHALL DANN Attesting Officer Commissioner ofPatents F ORM PO-1050 (10-69) USCOMM-DC 60376-1 69 uis. GOVERNMENTrnm'rmc OFFICE nu o-ac-su.

1. An adhesive binding folder comprising: a backing strip; a firstcoating of self-adhesive material having a first surface, said coatinghaving a substantially uniform thickness and being attached to saidbacking strip on one surface thereof; two outside enclosing covers whichare directly attached to a second surface of said first adhesive coatingopposite said backing strip so as to be attached to said one surface ofsaid backing strip by said first adhesive coating, said covers beingattached to opposite elongated margins of said backing strip leavingadhesive exposed in the central area of the strip between edges of thecovers; and a second coating of self-adhesive material of asubstantially uniform thickness covering only a portion of said firstadhesive coating and having one entire surface attached to said firstadhesive coating, said second adhesive coating being disposedexclusively in the area between the two outside covers wherebyindividual leaves can be attached to said second adhesive coatingbetween said covers and the total thickness of adhesive being greater inthe area covered by said second coating than in the area covered only bysaid first coating; a carrier strip having a silicone coating on onesurface thereof and being attached to said second adhesive coating alongthe surface having said silicone coating on the side opposite saidbacking strip and capable of being easily removed from said secondcoating, whereby the individual leaves can then be attached to saidsecond coating; and an inner protective sheet having an edge zoneextending along one of said elongated margins, said zone beinginterposed between said first adhesive coating and said second adhesivecoating, said inner protective sheet being arranged so as to cover atleast a portion of the outer surface of said second adhesive coating forcovering adhesive exposed by removal of individual leaves.
 2. Adhesivebinding folder as set forth in claim 1, wherein said second adhesivecoating is spaced from each of said covers by a predetermined distance,which is at least equal to the thickness of said covers, when the coversare in an open position.
 3. Adhesive binding folder as set forth inclaim 1 wherein said inner protective sheet is made of a thin plasticfoil.